Graded Assignment Unit Test, Part 2 Answer the questions below. When you have finished, submit this assignment to your teacher by the due date for full credit. For full credit, you must show all steps of your calculations. Scroll down to view the periodic table at the end of this document. (5 points) 1. Use the solubility curve to answer the following questions. Solubility vs. Temperature Score 100 90 NaNO3 Pb(NO3)2 KNO3 Solubility (g of salt in 100 g H20) 80 80 70 60 CaCl2 50 40 NaCl 30 20 10 % KCI KCIO3 K2Cr2O7 Ce2(SO4)3 10 20 30 40 50 60 70 80 90 100 Temperature (°C) a. Interpret the graph. What does it tell us about solubility? b. How much sodium chloride can dissolve in 80° C? C. Which substance shows a different trend than the others in its solubility? d. Mary dissolves the maximum amount of KNO3 possible into 100 grams of boiling water and then cools the solution quickly to a temperature of 12° Celsius. What is she likely to see? (5 points) 2. Rafiq dissolves 3.5 g of NaCl in 0.15 kg of water. The salt dissolves to form a solution of sodium and chloride ions.. What will the freezing point of the solution be? (Freezing- point depression constant for water is -1.85 C/m). Please be sure to provide all steps of your calculations for full credit. Stride, Inc. All rights reserved. No reproduction without written consent of Stride, Inc. Score Page 1 of 3 Graded Assignment (5 points) Science | Unit: Solutions | Lesson: Unit Test 3. In your own words, what happens at the molecular level when a solid dissolves into a liquid. Then, list three factors that we studied in this unit that influence the rate of solubility and how they do so. (5 points) 4. Consult the periodic table below and calculate the concentration of the solution. Be sure to include your units in your final answer. Mixtures Sample A Sample B Sample C Solute 16 g KCI 25 g NaCl 120 g O2 Solvent 0.4 L of water 100 g water 1350 g CO2 Concentration Molarity= Mass percent= Mole fraction of O2= O Stride, Inc. All rights reserved. No reproduction without written consent of Stride, Inc. Score Score Page 2 of 3 Period 7 Period 6 Period 5 Period 4 Period 3 Period 2 Period 1 Graded Assignment Group 1 1A Periodic Table Nonmetals Metalloids Noble gases Halogens Other nonmetals Science | Unit: Solutions | Lesson: Unit Test Group 18 8A Atomic number Metals 2 1 H Hydrogen 3 Cu Solid Ar Gas Alkali metals He Group 2 Symbol 1,0079 2A H Be Name Average atomic mass Hydrogen 1.0079 Br Liquid Am Not found in nature Alkaline earth metals Transition metals Other metals Group 13 ЗА Group 14 4A Group 15 5A Group 16 6A Group 17 7A 5 6 B F Helium 4.0026 10 Ne Lithium 6.941 Beryllium 9.0122 Boron 10.81 Carbon 12.011 Nitrogent 14.007 Oxygen 15.999 Fluorine 18.998 Neon 20.179 11 Na 22.990 12 Mg Magnesium 24.305 15 16 17 18 ΑΙ Si Ar Group 3 Group 4 Group 5 Group 6 3B 4B 5B 6B Group 7 7B Group 8 8B Group 9 9B Group 10 10B Group 11 11B Group 12 12B Aluminum 26.982 Silicon 28,086 Phosphorus 30.974 Sulfur 32.06 Chlorine Argon 35.453 39.948 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Sc Ti Mn Fe Co Ni Cu Potassium Calcium Scandium 39.098 40.08 44.956 Titanium 47.90 Vanadium 50.941 Chromium 51.996 Manganese 54.938 Cobalt Copper Zn Ga Ge As Se Br Kr 55.847 58.933 58.71 63.546 65.38 Gallium 69.72 72.59 Arsenic 74.922 Selenium 78.96 Bromine 79.904 Krypton 83.80 38 39 41 42 43 45 46 47 48 50 51 52 53 54 Rb Sr Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te Xe Rubidium 85,468 Strontium 87.62 Yttrium Zirconium 88.906 91.22 Niobium 92.906 Molybdenum Technetium 95.94 (98) Ruthenium 101.07 Rhodium 102.91 Palladium Silver 107.87 Cadmium 112.41 Indium 114.82 118.69 Antimony 121.75 Tellurium 127.60 lodine 126.90 Xenon 131.30 55 56 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 Cs Ba Lu Hf Ta W Re Os Ir Pt Au Cesium Barium 132.91 137.33 Lutetium 174.97 Hafnium 178.49 Tantalum 180.95 Tungsten 183.85 Rhenium 186.21 Osmium 190.2 Iridium 192.22 Platinum 195.09 Gold 196.97 Mercury Thallium 200.59 204.32 Lead 207.2 Hg TI Pb Bi Po Polonium (209) At Rn Astatine (210) Bismuth 208.98 Radon (222) 87 88 103 104 105 106 107 108 109 110 111 112 114 Fr Ra Lr Rf Db Sg Bh Hs Mt Ds Rg Uub Francium (223) Radium (226) (262) (261) Lawrencium Rutherfordium Dubnium Seaborgium (263) (262) Bohrium (264) Hassium (265) Meitnerium (268) Darmstadtium Roentgenium (269) Ununbium (272) (277) Uuq Ununquadium When the average atomic mass is shown in parentheses, it means that this is the mass number of the most stable isotope. For these elements the average atomic mass cannot be determined. 57 58 59 60 61 62 63 64 65 Lanthanide Series La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho 67 68 69 70 Er Tm Yb Lanthanum 138.91 Cerium 140.12 Praseodymium Neodymium 140.91 144.24 89 90 91 92 Promethium (145) 93 Samarium 150.4 Europium 151.96 Gadolinium 157.25 Terbium 158.93 Dysprosium 162.50 Holmium 164.93 Erbium 167.26 Thulium 168.93 Ytterbium 173.04 94 95 96 97 98 99 100 101 102 Actinide Series Ac Th Pa U Am Cm Bk Cf Es Fm Md No Actinium (227) Thorium 232.04 Protactinium Uranium Neptunium Plutonium 231.04 238.03 (237) (244) Americium (243) Curium (247) Berkelium (247) Californium (251) Einsteinium (252) Fermium (257) Mendelevium (258) Nobelium (259) O Stride, Inc. All rights reserved. No reproduction without written consent of Stride, Inc. Your Score Click or tap here to enter text of 20 Page 3 of 3